Polyol compositions and their use in the preparation of high resilience polyurethane foams

Abstract

The present invention relates to polyol compositions, their use in the preparation in resilience polyurethane foams and to foamed articles prepared from formulations containing such polyol formulations.

We claim: 
     
       1. A composition for use with high index isocyanate and low water content in the preparation of high resilience polyurethane foams comprising: (1) a high functionality polyol or polyol blend not being ethylene diamine initiated and being polyoxyalkylene oxide or a blend thereof having an ethylene oxide content of between 8 and 25 percent and having an equivalent weight between 1000 and 4000 and an average nominal functionality between 3.2 and 6, present in an amount of from 50 to 98 weight percent based on the total weight of the polyol composition   (2) a subsidiary polyalkylene oxide having a maximum functionality of 8 and containing at least one hydroxyl group which subsidiary polyalkylene oxide has an equivalent weight between 300 and 6000 and a poly(oxyethylene) content greater than 30 percent by weight of alkylene oxide, present in an amount of from 0.2 to 0.6 weight present based on the total weight of the polyol composition, and   (3) a stably dispersed polymer within the high functionality polyol and/or the subsidiary polyalkylene oxide, wherein said polymer is present in an amount of from 2 to 50 weight percent based on the total weight of the polyol composition, or a polymer polyol or a blend of polymer polyols provides from 2 to 50 percent by weight of polymer based on the total weight of the polyol composition; wherein the average nominal functionality of the mixture of (1) and (2) is between 3.2 and 6.     
     
     
       2. A polyol composition of claim 1, wherein said high functionality polyol is a polyalkylene oxide polyol or polyalkylene oxide polyol blend having an equivalent weight between 1000 and 3000 and an average nominal functionality between 3.2 and 6. 
     
     
       3. A polyol composition of claim 2, wherein said polyalkylene oxide polyol or polyol blend is a poly(oxyethylene-oxypropylene) polyol or a blend of poly(oxyethylene-oxypropylene) polyols. 
     
     
       4. A polyol composition of claim 1, wherein the subsidiary polyalkylene oxide has an equivalent weight between 500 and 6000 and a poly(oxyethylene) content greater than 60 percent. 
     
     
       5. A polyol composition of claim 4, wherein said subsidiary polyalkylene oxide is a poly(oxyethylene-oxypropylene) polyol.